Tempest

You create a swirling storm cloud, centered on a point you can see and covering a cylinder with a 60-foot radius and a height up to 2,000 feet. Each creature starting its turn below the cloud must succeed on a Constitution saving throw or take 4d8 thunder damage and be deafened until the start of its next turn.

As long as you maintain concentration on the spell, you can use your action to intensify the storm. You can add one of the following effects to the storm, which lasts for the duration. Adding an effect does not remove prior effects, though most effects can be added only once.

• Lightning. Lightning strikes rain down. As a bonus action, you can designate two points below the cloud to be struck by lightning. All creatures within a 10-foot radius of either point must make a Dexterity saving throw, taking 4d12 lightning damage on a failure or half as much on a success.

• Downpour. Torrential rain falls. The storm’s entire area becomes difficult terrain, and heavily obscured to every creature except you.

• Hurricane. Gusting winds whip with brutal ferocity. Ranged weapon attacks in the area automatically miss. Every Huge or smaller creature starting its turn below the cloud must succeed on a Strength saving throw or be thrown 30 feet in a random direction and knocked prone.

• Hailstorm. Icy stones rain down. Each creature starting its turn below the cloud takes 2d10 bludgeoning damage. Any creature below the cloud has disadvantage on saving throws it makes to maintain concentration.

• Expansion. You can move the storm 120 feet or increase its radius by 60 feet. You can add this effect any number of times.